We found this kitten the other day, and my mom took it into our house and adopted it. It was pretty cold outside (40F) when we found it. The cat was fine the first night we had it, and then the next morning it started throwing up, wasn't eating, and was really lethargic. That afternoon it died. My mother is now concerned that the cat had some sickness that it could have passed on to us. Does anyone know why the cat may have died? Is there anything that we need to be concerned about with our health?